Dr. Ahmed G. Abo-Khalil

asynchronous bus

Early computer buses were literally parallel electrical wires with
multiple connections, but the term is now used for any physical
arrangement that provides the same logical functionality as a parallel
electrical bus. Modern computer buses can use both parallel and bit serial connections, and can be wired in either a multidrop (electrical parallel) or daisy chain topology, or connected by switched hubs, as in the case of USB.